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14 Cards in this Set
- Front
- Back
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What is Primate space?
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Spacing is seen :
-Between incisors -Mesialto the maxillary canine -Distal to the mand canine |
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What are the Posterior relationships of the deciduous molars?
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Distal step
Mesial step Flush terminal step |
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Distal step can lead to what class of occlusion?
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class II and end-end
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Mesial step can lead to what class of occlusion?
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Class I or Class III
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Flush terminal step can lead to what class of occlusion?
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End-end or Class I
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What is incisors liability?
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When the lower lateral incisors erupt, there is on average 1.6 mm less space available for them
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Describe the repositioning of the canines in the mandiblar arch
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canines move slightly back into the primate space
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What are the causes of changes in the molar relationship?
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leeway space
Mandible growth Inter-canine width increase |
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What is leeway space?
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Gap referring to the difference between the sum of mesio-distal widths of primary 3,4,5 and permanent 3,4,5
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The Lee-Way space is larger in which arch?
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mandible
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typical size of leeway space?
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Max: 0.9mm
Mand:1.8mm |
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To align a mildly crowded lower incisors where can you obtain the space?
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A more labial position and angulations of the permanent incisors
Inter-canine width increase A slight increase in the width of dental arches Encroachment posteriorly into the leeway space (by the orthodontist) |
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Factors that may influence the dental arch Patterns?
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Genetic predisposition
Early loss of primary teeth, Inter-proximal caries Ankylosis of primary teeth Oral habit Trauma |
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Loss of early deciduous dentition can lead to...?
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Mesial drift
centre line loss over eruption of oppsing tooth |
